Process of purifying acetylene gas.



ciently concentrated state, and they are not' UNITED sT 'r s PATENT OFFICE.

GEORGE FRANQOIS JAUBERT, or PARIS, FRANCE.

PRO CESS OF PURIFYING ACETYLENE GAS- Specification of Letters Patent.

Patented April 9, 1907.

Application filed November 24, 1905. Serial No. 288,984.

To all/whom it. may concern.-

Be it known that I, GEORGE FRANooIs JAUBERT, a citizen of the French Republic, and a resident in Paris, France, (155 Boulevard Malesherbes, Paris, France,) have invented a certain new anduseful Process for the Purification 0f Acetylene Gas, of which the following is a specification.

This invention has for its object an improved process for eliminating from raw acetylene gas the phosphoreted hydrogen,

which, as is known, constitutes the impurity which is the most undesirable and at the same time the most difiicult to eliminate. For this purpose sulfuric acid, hydrochloric acid, and other acids have already been used, but without satisfactory result, owing to the fact that they, have not been used in a sufliliable to keep during a long time the property Of'retaining the phosphoreted hydrogen. After a time this phosphoreted hydrogen is en tirely given up and acid in such a condition is .not capable of reutilization.

The applicant has found that when the acid is used in a sulliciently concentrated state and when arsenious anhydrid or any other arsenic derivative is added to the acid there is atonce formed a compound of arsenic and phosphorus which is completely insoluble and of reddish color and precipitates, so that the acid used for washing the gas is always ready for purifying sufii'cient quantities of acetylene gas.

The process according to this invention therefore consists in passing the acetylene gas as soon as it is formed into appropriate washing-tanks of any known construction which contain sulfuric acid concentrated at 6264 Baum, saturated with arsenious anhydrid or any appropriate arsenic derivative, such as white arsenic.

The operation of the process will be easily understood from the foregoing statement, and it is seen that as the acid Wlll never lose the property of eliminating the phosphoreted hydrogen the process will be carried out as a continuous process.

Instead of using solution as above in a liquid state the acetylene gas may also be caused to circulate in a vessel containing infusorial earth, sand, pumice-stone, or any other porous material impregnated with the which consists in passing such gas through a.

concentrated acid saturated with an arsenic derivative.

Dated this l'lth day of November, 1905.

I I GEORGE FRANCOIS JAUBERT. In presence of- FREDERIC M. CAULDWELL, HENRY SCIIWAB. 

